code: def write_stats(self, filestream):
      if not self.summary:
          self.summarize()
      filestream.write(str(self.summary) + "\n")
  
imports: import os
  import sys
  import torch
  import torchaudio
  import logging
  import speechbrain
  from pesq import pesq
  from pystoi import stoi
  from composite_eval import eval_composite
  from hyperpyyaml import load_hyperpyyaml
  from speechbrain.utils.data_utils import undo_padding
  from speechbrain.utils.distributed import run_on_main, if_main_process
label_desc: Use image node_id 2 for calling the CompositeStats obj's underlying member method code with example usage: obj.write_stats(filestream) without return types